Regulatory Matters (Schedule of Net Carrying Value Of Facilities and Megawatt Capacity) (Details) $ in Millions	6 Months Ended	12 Months Ended
	Jun. 30, 2022 USD ($) MW	Dec. 31, 2034 asset	Dec. 31, 2021 USD ($)
Public Utilities, General Disclosures [Line Items]
Net property, plant and equipment	$ 113,851		$ 111,408
Duke Energy Carolinas
Public Utilities, General Disclosures [Line Items]
Net property, plant and equipment	34,959		34,122
Duke Energy Progress
Public Utilities, General Disclosures [Line Items]
Net property, plant and equipment	23,908		23,657
Duke Energy Florida
Public Utilities, General Disclosures [Line Items]
Net property, plant and equipment	18,617		18,046
Duke Energy Indiana
Public Utilities, General Disclosures [Line Items]
Net property, plant and equipment	$ 11,885		$ 11,760
Generation facilities to be retired
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW	8,386
Net property, plant and equipment	$ 6,049
Generation facilities to be retired | Duke Energy Carolinas | Allen Steam Station Unit 1
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW	167
Net property, plant and equipment	$ 12
Generation facilities to be retired | Duke Energy Carolinas | Allen Steam Station Unit 5
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW	259
Net property, plant and equipment	$ 265
Generation facilities to be retired | Duke Energy Carolinas | Cliffside Unit 5
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW	546
Net property, plant and equipment	$ 362
Generation facilities to be retired | Duke Energy Progress | Mayo Unit 1
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW	713
Net property, plant and equipment	$ 634
Generation facilities to be retired | Duke Energy Progress | Roxboro Units 3-4
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW	1,409
Net property, plant and equipment	$ 443
Generation facilities to be retired | Duke Energy Florida | Crystal River Units 4-5
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW	1,442
Net property, plant and equipment	$ 1,615
Generation facilities to be retired | Duke Energy Florida | Crystal River Units 4 and 5 | Forecast
Public Utilities, General Disclosures [Line Items]
Facilities retiring ahead of schedule | asset		2
Facilities retiring ahead of schedule (in years)		8 years
Generation facilities to be retired | Duke Energy Indiana | Gibson Units 1-5
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW	2,845
Net property, plant and equipment	$ 2,058
Generation facilities to be retired | Duke Energy Indiana | Cayuga Units 1-2
Public Utilities, General Disclosures [Line Items]
Capacity (in MW) | MW	1,005
Net property, plant and equipment	$ 660